<!DOCTYPE html>
<html>
<head>
<script src="../../../resources/js-test.js"></script>
</head>
<body>
<div>This test passes if it does not crash.</div>
<div id="host" tabindex="-1"></div>
<script>
var shadow = host.attachShadow({mode: 'open'});
host.focus();
if (window.eventSender)
    eventSender.keyDown('\t');
</script>
</body>
</html>
